<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<form oninput="result.value=parseInt(a.value)+parseInt(b.value)">
    <input type="number" name="b" value="50" max="1000" /> +
    <input type="number" name="a" value="10" /> =
    <output name="result"></output>
    <p>
        heat the oven to<meter value="333" min="300" max="400"  optimum="400">350 degrees</meter>
    </p>
    <p>
        <progress max="100" value="10" style=" -moz-orient: vertical;"></progress>
    </p>
</form>
</body>
</html>